Here is a automatic replie from their support service you may find helpfull

Hello,

This is an automated reply to notify you that customer support is currently receiving a high volume of tickets. As it may take some time for your inquiry to be reviewed, we recommend trying some of the fixes below for common reported issues.

If you are encountering a "Decompress Failed" error, please try the following:(Deactivate all firewalls and antivirus programs before attempting)1. Completely uninstall the game and delete any remaining WarZ files2. Download WarZ_WebSetup.exe from http://www.thewarz.com/download3. Create a new folder (Name it something like TheWarZ) in Program Files [Program Files (x86) if using a 64-bit operating system] and change its security permissions to include "Everyone" with "Full control"4. Run the setup program and install the game into the newly created folder5. Right-click the launcher and set it to launch in compatibility mode for Windows XP6. Run the launcher as Administrator and allow the game to update

For network-related issues:1. Go to www.hotspotshield.com2. Unblock the following ports 33000-340003. Add an exception for the launcher and the game for your virus scanner and firewall. (WarZlauncher.exe WarZ.exe)4. Enable DMZ on your router.

If you see a white/black screen or see no graphics or weird graphics in game this is a known issue with Radeon cards. We recommend the following to resolve this issue:1. Go to CCC (catalyst control center) > Gaming > 3D Application Settings2. Select New Application3. Hit default and save your settings

@indeed i didnt oc my gpu, only processor, its i7@4.4ghz, my video card is standard amd6970hd and im not using vsync in any game. i redownloaded the game from their website and didnt work for me and i must say i have new titles like hitman absolution, crysis or gta4 and it all works perfect on ultra settings so most probably its not problem with my pc specs, let me check how it will work when i delete arktos, gimme sec

Download the Radeon 13.6b2 drivers for your graphic card if your not running it already. Make sure you do a complete uninstall with your graphic card driver when it asks then install the new drivers don't over write them then restart your computer and install the new 13.6b2 drivers.

Mine was looking exactly the same. Go into your Nvidia dashboard/AMD Vison Control Center, go to gaming and then under 3D Applications hit "defaults" or turn anti-aliasing to "Use application settings". Hope this helps.